Wrench



June 12, 1923. 1,458,474

J. H. FONES WRENCH Filed April 26, 1922 Patented June 12;, 1923. r,

.NITE D STATES A i mE- JOHN H. nouns, on OAKLAND, CALIFOBNIAV w lwnnuouf Application filed April as, 1922. se ial No. 556,646.

To all whom it may concern: I

Be it known that I, JO N H. Forms, a citizen of the United States,residing at Oakland, in the county of Alameda and State of California,have invented new and useful lmprovements in l/Vrenches, of which thefollowing is a specificatlon. I

This invention relates toimprovements in' the minimum, the expensemanufacture is materially lessened andthe operationas to adjustment ofthe jawsniay be more quickly and easily effected.

An object of the invention is to provide inv a wrench of the characterdescribed an improved jaw ad usting locking mechanlsm which consists ofbut few and simply constructed parts or elements capable of beingreadily assembled or disassembled and which may be readily andeasilyoperated to provide for adjustment and locking of the jaws. I V

The invention possesses otheradvantages and features some of which, withthe foregoing will be set forth at length in the following descriptionwhere I shall outline in full that form of t e invention which I haveselected for, ill stration in the drawings accompanying and forming apart of the present specificatiom In said drawings I have shown one formof the construction of my invention, but it is to be understood that Ido not "limit myself to such form since the invention I as expressed inthe claims" may be embodied in a plurality of forms.

Referring to the drawingsf Fig. 1 represents a side elevation of. a

wrench constructed in accordance withithe I v f of the ribs and groovesis such that the pin present invention. I

Fig. 2 represents a fragmentary sectlonal view through the adjustablejaw partly illustrating the adjusting and locking means therefor.

Fig. 3 is a rear elevation of the adjustable jaw.

Fig. 4 is a sectional view taken on line 4 -4E of Fig. 2, the adjustablejaw being omitted.

Fig. 5 is a sectional view taken on line 5-5 of Fig. 2.

. Referring specifically to i thel. drawing -wherei-n Iliav'eillustrated one practical n' odification ofthe invention, 1 indicatesaffixed jaw carried on the outer end of a j aw slidesso as to cooperatewith thefixed jaw l. The adjustable jaw 3 is provided with a recess 4onthe underside of its body whereby access ;may be had "to rack 5.formed on the loweredge of thehandle 2.

handle 2, upon which handle an adjustable Mounted for rotation withinthe recess 4 and for bodily .niovernent towards and away frorn the rack5, is a worm'element' (3, which when engaged with the rack 5'will'provide for adjustment and for locking of from the rack will permit of aquick movement or adjustment of the jaw towardsfor away from the fixedjaw. j

A particular feature of the invention is the adjustable jaw andwhendi'sengaged the mounting of the worm element 6, the

said mountingprincipally comprising apin or shaft 7 upon a mediateportion of which the worm element 6 is fixed byineans ofa transverselyinsertedscrew or. pin8. "The body portion of the jaw 3 is formed withinlongitudinally extending cylindrical bore .9

for the pin 7, there being a portion of said bore "on each side of therecess 4 whereby end portionsflof the pin may. be. mounted for movementinsaid bo're. The pin TinQ stead of being cylindrical in cross section,is. formed, more particularly where it"extends from the opposite ends ofthe worm element .6, so as to be more or less semi-cylindrical andsothat there will be provided longitudinally extending ribs 10 on saidpin. 7

The outer edges of these ribs are, adapted to have'a working fit withthe bore so thatthe pin [will properly rotate when the member 6 isturned. Extending longitudinally of I the bore and opening'into thelatter, are

grooves .11 being of just sufficient width to accommodate the ribslO.The formation ment or movement of the movable jaw, the

worm element 6 is turned so that the ribs 10 on the pin 7 will bebrought intoregistration with the grooves 11. By then pulling 3 will beheld in adjustedposition.

One end of the pin 7 terminates short of the adjacent end of the bore 9and has engaged therewith a circular disc 12, which disc is yieldinglyheld againstsaid end by a helical expansion spring 13 mounted withm thebore. The spring 13 places the pin 7 under tension such that'when theworm 6 and pin are moved and the worm is free of the rack, its positionwill be maintained due tosuch pressure. The disc 12 provides for smoothand frictionless transmission of pressure to the pin which due to itsirregular shape at its ends, would otherwlse become I entangled with theend of the spring.

\Vith the adjusting and locking mechanism of-this invention it will beseen that the wrench may be very easily constructed and readily andeasily assembled and disassenlbled since but few parts are required toprovide the said mechanism. The mechanism is protected and concealedforthe most part such that it will not be, subject to rust or damage duetoexposure to the elements.

1. A wrench comprising a handle having a rack and a jaw thereon, asecondjaw slidable upon the handle andphaving a recess therein permittingaccess to the rack, said movable aw having a bore thereln, a pm movablebodily within the bore, a rib on said pm, said jaw having a groove openng into the bore and adapted to receive said rib to v permit movement ofthe pintowards and away from the rackand a worm onthe pin and; adaptedto. be moved into, and out of engagement with the rack and rotated whilein contact with therack 2. A'wrench comprising a handle having a rackand a jaw thereon, a jaw slidable upon the handle and provided with arecess H permitting access to the rack and with a pin bore opening intothe recess, a pin rotatable within the bore and extending into therecess, a worm fixed to the pin and adapted to engage the rackand meansproviding for movement of said pin and worm whereby the worm may bedisengaged from the rack which means comprises a rib extendinglongitudinally on the pin and a complementary longitudinal groove in thebore adapted to receive said rib..

A wrench comprisinga handle having a'rack and a jaw thereon, a jawslidable upon the handle 'and provided with a recess permitting accessto the rack and with a pin bore opening into the recess, a pin rotatablewithin the boreand extending across the recess, a worm fixed to the pinand adapted to engage the, racln means providing for move. ment of saidpin and worm whereby the worm may be disengagd from the rackwhich meanscomprises a rib extending longitudinally on the pin and a complementarylongitudinal groove in the bore adapted to receive said riband springmeans yieldingly engagng one end of the pin within the bore.,

4. A wrench'comprising a handle having a rack and a jaw, a second jawslidable upon said handle and having a .recess permitting access to therack, a worm in said recess adapted to cooperate with the rack, and apin extending into said second jaw and worm parallel to the rack formounting the worm in said recess, said pin and one oi the parts intowhich it extends being oapable of relative lateral movement and having arib on the pin and a groove in the said part to limit said lateralmovement to the position of registration of said rib and groove in therotation of the worm.

5. A wrench comprising a handle having a rack and a jaw, a second jawslidable upon the handle and having a recess per initting, access to therack, a worm in said recess adapted to cooperate with the rack, and apin projecting from said worm into said second jaw parallel to the rackfor mounting the worm in the recess, said pin be ng capable of lateralmovement in the second jaw and the pin andsecond jaw having one a riband the other a groove to limit said lateral movement to the position ofregistration of said rib and groove in the rotation of the worm.

JOHN H. FONES.

